Software Library Engineer, Blockstream
C++
Bitcoin and digital asset infrastructure
Job no longer available
Bitcoin and digital asset infrastructure
101-200 employees
Job no longer available
101-200 employees
Company mission
To create the financial infrastructure of the future.
Role
Who you are
- The ideal candidate will combine strong technical skills with a collaborative mindset to ensure the project remains robust, efficient, and developer-friendly
- 5+ years of software development experience, with at least 3 years focused on C++ in complex, multi-component systems
- Experience with cross-language integration (e.g., C++ with Rust, Python, Java, or Swift)
- Familiarity with CMake, Docker, and CI/CD workflows
- Expert-level proficiency in C++ (modern standards, e.g., C++17/20)
- Strong understanding of systems programming, memory management, and performance optimization
- Knowledge of testing frameworks and writing robust unit/integration tests
- Exceptional problem-solving and debugging capabilities
- Clear communication skills for documenting code and collaborating with distributed teams
- Ability to manage priorities and lead technical initiatives
Desirable
- Experience with Rust and/or Python
- Background in bitcoin or cryptocurrency development
- Knowledge of cryptography
- Familiarity with SWIG or similar tools for language bindings
- Contributions to open-source projects on GitHub, especially in C++ ecosystems
- Bachelor’s degree in Computer Science, Engineering, or a related field (or equivalent experience)
What the job involves
- We are seeking an experienced Software Library Engineer, with deep expertise in C++ to lead the development and maintenance of the Green Development Kit (GDK), a vital software development kit for our bitcoin wallet apps
- This role focuses on the Core SDK (written in C/C++) while overseeing its integration with Rust modules, language wrappers (Java, Python, Swift), build systems (CMake, scripts, Docker), testing frameworks, and documentation
- Core SDK Development & Wrapper Integration (C/C++)
- Lead the development, maintenance and testing of the Core SDK, written in C/C++
- Debug complex issues, enhance performance, and ensure seamless integration with the Blockstream wallets and third party users
- Build System Contributions:
- Maintain and enhance CMake build files, build scripts, and Docker configurations to support C++ development and cross-component builds
- Resolve build-related issues and optimize for multiple platforms
- Publish regular releases incorporating new features, fixes and performance improvements
- Testing & Continuous Integration (CI):
- Develop and maintain C++-focused test cases within the testing suite
- Work with CI pipelines to validate Core SDK changes and their impact on downstream components
- Documentation
- Document C++ APIs, core functionality, and integration points for contributors and end-users
- Collaborate with the team to keep project-wide documentation current and accessible
- Collaboration with Mobile App Developers
- Partner with mobile app developers, the primary users of the GDK library, to understand their needs and ensure the Core SDK meets requirements for iOS (Swift) and Android (Kotlin) environments
- Provide technical support and guidance to app developers integrating the library into their applications
Our take
Bitcoin’s blockchain shows great potential to form the future foundation of financial infrastructure. However, working in advanced areas such as Bitcoin mining, asset issuance, and the Lightning Network goes beyond the fundamental framework, and requires expensive assistance from blockchain engineers. Blockstream develops technology to make it easier for businesses and individuals to make use of the Bitcoin blockchain, opening it up to a wider range of users.
Blockstream's offerings include tech to help people utilize advanced technology within the Bitcoin blockchain, including microtransactions on the Lightning Network, enterprise-class Bitcoin miner hosting, and layer-2 digital asset issuance. The company also provides Blockstream Satellite, a technology that leverages satellites to stream blockchain transactions without the internet, preventing them from being disrupted by connection loss.
Whilst the technology Blockstream is facilitating access to already exists, the company has smartly recognized the inaccessibility of its advanced features, and found its niche in providing an easier way to work with the technology. The company has seen impressive growth too, recently acquiring several companies and expanding its name across borders and it shows no signs of slowing down any time soon.
Freddie
Company Specialist at Welcome to the Jungle
Insights
30% employee growth in 12 months
Company
Funding (last 2 of 5 rounds)
Oct 2024
$210m
CONVERTIBLE
Jan 2023
$125m
CONVERTIBLE
Total funding: $621m
Company HQ
Downtown Menlo Park, Menlo Park, CA
Leadership
Erik Svenson
(Co-Founder & President)Prior to co-founding Blockstream in 2014, Erik spent over 4 years at Dan's Plan as COO. He was also a Finance & Strategy Consultant at various small and mid-sized companies as well as VP at AIG Investment.
Adam Back
(Co-Founder & CEO)Adam co-founded Bitcoin Standard Treasury Company in 2025 and serves as the company's CEO. He is also an independent Applied Cryptographer and has been an Owner & Consultant at Cypherspace Internet Security since 1997.
Michael Minkevich
(COO & President)Prior to joining Blockstream in 2024, Michael was a Tech CEO at Unfurl, a Technical Advisor at Blockchain Generation Ventures, and CEO at Intellectsoft.
Michael Golomb
(CFO)Michael is also the founder of FANVESTOR. Previously, he served as the Interim CFO at Space Perspective and as CFO at HyperloopTT.
Jeff Boortz
(CPO)Jeff previously spent 14 years at Google. While there, he held various roles, including Director and then Senior Director of Product Management.
Aleksey Skopenko
(CIO)Aleksey previously spent over 13 years at Acronis, as a Service Operations Manager and Director then Senior Director of Information Technology.
Peter Bain
(CMO)Peter joined Blockstream in 2024 as a VP of Consumer Products, moving into the role of CMO in 2025. He is also the co-founder of RenewH2O and previously co-founded BrightWater HDC.
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